Jack for shoe-machines.



F. E. VALOIS.

JACK FOR SHOE MACHINES.

APPLICATION FILED FEB. 12. 1915.

1 1 73, l 3 1 Patented Feb. 22, 1916.

TI .1. g 5 E! E5 I/EZL 4 ,v v \x/HrNEssEs: INVENTDl I WX W M a m Wm. M 1 YfiM QA WWW... mmum m THE COLUMBIA PLANOGRAPH co., WASHINGTON D I:

TTE TATS PART @FFTQE.

FELIX E. VALOIS, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR TO HAMEL SHOE MACHINERY COMPANY, OF LYNN, MASSACHUSETTS, A CORPORATION OF MAS- SACHUSETTS.

Application filedl February 12, 1915.

To all whom it may concern:

Be it known that I, FELIX E. VALoIs, citizen of the United States, residing at Haverhill, county of Essex, State of Massachusetts, have invented a certain new and useful Improvement in Jacks for Shoe-Machines, of

which the following is a specification, reference being had therein to the accompanying drawings.

In the manufacture of shoes, and particularly during the insertion of nails or slugs in the heels while the shoe is on the last, it is necessary that the jack be capable of accommodating itself to any inaccuracies in the last or in the position of the hole in the last or in the shoe, since otherwise the tread surface of the top lift of the heel will not be presented to the nailing instrumentalities in a horizontal plane. Also inequalities or inaccuracies of the kinds mentioned sometimes result in using more material or in making it necessary to trim the heel again. Since the jack must be firm and capable of withstanding the heavy blow dealt by the slugging or other machine and since the relation of the hole in the last to the bottom of the heel is likely to vary somewhat in every last, the problem presented is one of considerable difliculty.

The object of my present invention is therefore to provide a jack or shoe support which will readily and automatically accommodate itself to the ordinary variations which occur and which may be adjusted for greater variations, while at the same time afl'ording a rigid structure against which the nailing instrumentalities will work perfectly. The jack embodying my invention instantly accommodates itself to any small inequalities. It is also capable of further adjustment if required. While I have described my improved jack as intended for use with a last by which the shoe is supported during one or more operations in its manufacture, I also provide a small last like member of much smaller size than alast, for use if it is desired to operate on shoes not on lasts.

The invention will be fully understood by reference to the following specification taken in connection with the accompanying drawings and the novel features thereof are pointed out and clearly defined in the claims at the close of this specification.

In the drawings, Figure 1 is a front eleva- Specification of Letters Patent.

' ceived within suitable projections JACK FOR SHOE-MACHINES.

Patented-Feb. 22, 1916.

Serial No. 7,879.

tion of a jack embodying my invention. Fig. 2 is a side elevation of the jack and of the jack support with which it is used, the latter being in section. A part of the frame of a slugging machine is also shown in this view. Fig. 3 is a view similar to the view shown in Fig. 2, illustrating the manner in which the jack accommodates itself to different positions of the last. Fig. 4: shows a last like member to be employed when it is desired to operate on shoes not on lasts.

Referring to the drawings, there is shown at A, a part of the frame of the machine, at B the jack support and at C the jack proper. The last is shown in drtted lines in Figs. 2 and 3 and is designated D.

The jack proper comprises a spindle 11 secured rigidly at its upper end by a set screw 12 to a collar 13. The jack spindle is rounded at its lower end as shown in Fig. 1. The said collar is provided with a pair of upwardly projecting arms I l and 15 which. together with the collar form a fork. On this fork is pivoted a segment 16 provided at its upper end with the pin 17, of suitable size and shape to be inserted in the hole of the last. It will be understood that any suitable member for contact with the last or shoe may be provided. The segment 16 may be swung about the pivot 18 for the purpose of rough adjustment and is secured in adjusted position by means of the set screw 19 which engages the segment 16 at its lower end. At 20 is shown an adjustable stud which forms a rest or abutment for the lower end of the segment and against which the segment is clamped by the set screw 19.

The jack support B is hollow and is re- 22, and 23, on the frame of the slugging machine. It is adjusted vertically by means of the adjusting screw 24 and fixed in position after being adjusted by means of the set screw 25. The jack support has a conical bore 26 the bottom of which is rounded as shown at 27 to afford a suitable bearing for the lower end of the jack spindle 11. The shape of the conical bore of the jack support is such that the lower end of the stem 11 of the jack will always remain in the same position, this position being directly beneath the instrumentalities (not shown) by means of which the slug or nail is set, while at the same time permitting the jack to be moved to a considerable angle from the vertical in any direction. The conical bore of the jack support also permits the jack to be rotated freely about a vertical axis, and on the rounded lower end as a bearing. Vhen not in use the jack or spindle will rest against the side of the jack support.

In the use of my new jack, the operator loosens the set screw 19 and adjusts the segment to approximately the correct angle to the axis of the stem 11. He then tightens the set screw 19 and places the last on the pin 17 and with his hands holds the last in the proper position, the jack being sub stantially upright and the bottom surface of the top lift of the shoe being held horizontal. As the center of gravity of the jack when in vertical position is to one side of a line drawn from the bottom of the jack stem to the center of the last pin 17, the unequal distribution of weight will cause the jack to revolve about its vertical axis until the center of gravity reaches the lowest possible point. When this position has been reached, the jack will come to rest and the top surface of the bottom lift of the heel will be in a substantially horizontal plane. The last may be moved about by the operato-r from one position to another as required to insert the nails or slugs, and the jack will adjust itself to each new position without any act of the operator, and in each position will afford a perfectly rigid support. The blow struck by the slugging machine or the like with which the jack is used doe not cause the parts to dodge. The jack accommodates itself to each new position as the op rator follows around the edge of the heel in setting the nails or slugs, and always supports the heel firmly and permits its surface to be horizontal. The jack requires no attention other than what is necessary to position the heel properly as each slug is set.

In Fig. 4-, I have shown a last like member 28 to be inserted in a shoe when it is desired to operate on shoes not on lasts as is the practice in some factories. The last like member 28 is much smaller than the interior of the shoe and is therefore capable of a change of position in the shoe. The last like member 28 is secured to the upper part of the pin 17 on the jack by a screw 29.

IVhat I claim is:

1. The improved last support for slugging machines and the like which comprises a jack having its center of gravity at one side of its vertical axis, said jack being mounted to be automatically rotatable by its own weight about a vertical axis on its point of contact with the member on which it rests.

2. The improved last support for slugging machines and the like which comprises a jack composed of two parts hinged together about a substantially horizontal axis, and means for securing them in a. position of adjustment with the axes of the two members at an angle to each other whereby the center of gravity is at one side of the median line of the jack, said jack being free to rotate about a vertical axis on its point of contact with the member on which it rests until said center of gravity is in its lowest possible position.

3. In combination, thej ack support having a conical bore and a jack, said jack resting on the bottom of said conical bore and being free to rotate about a vertical axis relatively to the shoe to be operated upon and the jack support, the center of gravity of the said jack being at one side of the said vertical axis whereby the relative rotation will take place whenever the center of gravity is above its lowest possible position.

4. In combination a jack support, having a conical bore with a rounded lower end, a last having a hole therein and a jack, said jack having a rounded lower member to engage the conical bore of the last support and a pin to engage the hole in the last and being formed in two parts hinged together and capable of adiustment relatively to each other and being secured in a position of adjustment, whereby the center of gravity of the said jack is thrown to one side of the axis of the jack and the said jack is caused to rotate about its vertical axis.

5. The improved last support for slugging machines and the like which comprises a jack made in two parts hinged together,

one of said parts being provided with a fork and the other with a segment extending from the pivot of the hinge to a point within the fork. and means for clamping the fork and segment in different positions of adiustment, the center of gravity of the jack being at one side of its vertical axis,

said jack being free to rotate in the last, and at its point of contact with the member on which it rests.

In testimony whereof I affix my signature, in presence of two witnesses.

FELIX E. VALOISL Witnesses:

J OHN H. PARKER, ALICE H. MORRISON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

